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Tertiary alcohols (3^(@)) having at leas...

Tertiary alcohols `(3^(@))` having at least four carbon atoms upon drastic oxidation yield carboxylic acids with

A

One carbon atom less

B

Two carbon atoms less

C

hree carbon atoms less

D

Same number of carbon atoms

Text Solution

Verified by Experts

The correct Answer is:
B
Tertiary alcohols are not oxidised easily but on drastic conditions, these are oxidised to give first ketones and then acids by losing one carbon at each step.
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Paragraph Carboxylic acids are distinctly acidic because they ionize in water to give hydronium ions: RCOOH+H_(2)O hArr RCOO^(-) +H_(3)O^(+) The acidic strength depends upon the extent of ionizations of the acid and the stability of the anion formed. The acidic strength can also be expressed in terms of dissociation constant K_(a) or pK_(a) which are related as pK_(a)= -log K_(a) . Most unsubstituted carboxylic acids have K_(a) values in the range of 10^(-4) to 10^(-5) (pK_(a) =4-5) . The substitutents have marked effect on the acidic strength of carboxylic acids. Any group that stabilizes the carboxylate ion more than the carboxylic acid group will increase the acidic strength, and the group which destabilizes the carboxylate group more than the carboxylic acid group will decrease the acidic strength. In a similar manner, the electron-releasing groups makes benzoic acid weaker, while the electron-withdrawing groups make benzoic acid stronger. The ortho isomer of every substituted benzoic acid (whether electron releasing or electron withdrawing) is the strongest among the three isomers due to ortho effect. Which of the following is the weakest acid?

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BRILLIANT PUBLICATION-CARBOXYLIC ACID & THEIR DERIVATIVES-LEVEL-II
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  2. In the reaction, C(6)H(5)OH overset(NaOH)to (A) underset(140^(@)C,(4-7...

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  3. Carboxylic acid group does not give the usual addition and elimination...

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  4. In a set of the given reactions, acetic acid yielded a product C. C...

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  5. The correct order of increasing acid strength of the following compoun...

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  6. alpha-Hydroxypropanoïc acid can be prepared from ethanal by following ...

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  7. Which of the following methods give a carboxylic acid without homologa...

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  8. In which case number of carbon atoms is retained?

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  9. Select the incorrect statement.

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  10. Consider the following reactions, I. II. CH(3)CH(2)Br overset(...

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  11. Which one of the following compounds will react with NaHCO(3) solution...

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  12. CH(2)=CH(CH(2))(2)COOH and HBr reacts in presence of peroxide to give

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  13. Which of the following types of hydrolysis of esters give directly car...

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  14. Why the aromatic carboxylic acids do not undergo Friedel-Crafts reacti...

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  15. . The product Y is :

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  16. A hydrocarbon C(6)H(12) decolourises bromine and gives n-Hexane on hyd...

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  17. underset((A))(PhMe) underset(Delta,H(3)O^(o+))overset(KMnO(4)// overse...

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  18. Carboxylic acid, although unreactive to alcohols, reacts in the presen...

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  19. The acid D obtained through the following sequece of reactions is C(2...

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  20. Which of the following presents the correct order of the acidity in th...

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